KSS3-40 is a module 3, 40-tooth steel spur gear with a plain bore, made from S45C material, featuring a 20° pressure angle and standard full-depth teeth. It meets JIS grade N8 precision (JIS B1702-1: 1998) and has a tooth hardness of less than 194HB. The gear has an outer diameter of 126 mm, face width of 30 mm, and a keyway dimension of 8 mm × 3.3 mm. Allowable torque is 3.08 N·m under specified usage conditions, with a theoretical backlash range of 0.18 to 0.38 mm. The gear is designed for use without secondary operations that reduce tooth width, as this impairs precision and strength.
Module 3, 40 Tooth Mild Steel Spur Gear with Plain Bore
Inch Gears: AGMA 12, 10, 9, and 8
Available Pitches: 120 thru 16
Pressure Angles: 20° and 14.5°
Metric Gears: ISO 5 thru 9
Available Modules: 0.3 thru 3
Pressure Angles: 20° and 14.5°
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Elements of Metric Gear Technology
How to Achieve Optimum Performance in a Miniature Gear Train
You May Also Need:
Shafts
Bearings
Couplings
Our metal spur gears are available in a variety of materials, including:
With a variety of fastening styles, including:
| QTC METRIC GEARS | Stock Drive Products & Sterling Instrument - SDP/SI | |
|---|---|---|
| Product Category | Gears | Gears |
| Product Number | KSS3-40 | KSS3-40 |
| Product Name | Metal Spur Gears (metric) | Module 3, 40 Tooth Mild Steel Spur Gear with Plain Bore |
| Gear Type | Spur | Spur; Rack |
| Number of Teeth | 40 | 40 |
| Design | Metric | Metric |
| Pressure Angle | 20° | 20° |
| Material | Steel | Steel; Carbon Steel |
